If you want a product, why not just get a USB-Bluetooth adaptor? It would support HID as well as A2DP (music) and other Bluetooth protocols.
If you want to build something, I'd recommend getting a board with an ESP32.
The ESP32 comes with plenty of example code in their esp-idf SDK. You'd be needing:
esp-idf/examples/peripherals/usb/device/tusb_hid
esp-idf/examples/bluetooth/esp_hid_host
If you want a product, why not just get a USB-Bluetooth adaptor? It would support HID as well as A2DP (music) and other Bluetooth protocols.
If you want to build something, I'd recommend getting a board with an ESP32.
The ESP32 comes with plenty of example code in their esp-idf SDK. You'd be needing:
esp-idf/examples/peripherals/usb/device/tusb_hid
esp-idf/examples/bluetooth/esp_hid_host